#import multilingual
from django.db import models

from django.db.models.loading import get_model

import re

TYPE_IN_DESIGN_CHOICES=(
        ('FS', 'Flat Screen'),
        ('RC', 'Rotocolor'),
        ('RG', 'RGB'),
)
# return the maximum + 1 value of the code_name escaping any character
def voodoo_magic():
        return max([
                        int (
                                [ group if group.isdigit() else '' for group in re.match('([a-zA-Z_-]*)([0-9]+)([a-zA-Z_-]*)',bin.code_name).groups()][1]
                                ) for bin in get_model('designs','Design').objects.all()]) + 1 


class Design(models.Model):

        linked_product = models.ForeignKey('self',unique=True,blank=True,null=True)

        create_date = models.DateField(auto_now=True)
        update_date = models.DateField(auto_now_add=True)

        code_name = models.CharField(max_length=20,unique=True,default = lambda: voodoo_magic())
        internal_code_name = models.CharField(max_length=20,unique=True)
        design_type = models.CharField(choices=TYPE_IN_DESIGN_CHOICES,max_length=2)
        dpi = models.IntegerField(max_length=4)

        enabled = models.BooleanField()

        image_thumb = models.ImageField(upload_to='image_thumbs')
        scale_1to1_preview = models.ImageField(upload_to='images_1to1_preview')

        archive = models.FileField(upload_to='products',null=True)

        def __str__(self):
                return self.code_name

        # helper method for visualization in list
        def image_thumbnail(self):
                return '<img src="%s" />' % self.get_image_thumb_url()
        image_thumbnail.allow_tags = True 

        def image_scale(self):
                return '<img src="%s" />' % self.get_scale_1to1_preview_url()
        image_scale.allow_tags = True
        #############

        class Admin:
                list_display = ('code_name','create_date','design_type','image_thumbnail','enabled','image_scale')

                fields = (
                                (None,{
                                        'classes': 'wide',
                                        'fields': (('code_name','internal_code_name'),'enabled','dpi','design_type','linked_product','archive'),
                                }),
                                ('Images',{
                                        'fields':('image_thumb','scale_1to1_preview'),
                                }),
                        )

                list_filter = ('design_type','dpi','enabled',)
                search_fields = ('description',)

class Preview(models.Model):
        belong_Design = models.ForeignKey(Design,edit_inline=models.TABULAR)
        image_preview = models.ImageField(upload_to='images_preview',core=True)

class Color_preview(models.Model):
        belong_Design = models.ForeignKey(Design,edit_inline=models.TABULAR)
        image_color = models.ImageField(upload_to='image_color_preview',core=True)